Hydrocarbon motor



M. TIBBETTS HYDRQCARBON MOTOR May 10,1927.'

Filed Sept. 27. 1919 y Patented May 10, 1927.

UNITED STATES PATENT OFFICE.

MILTON TIBBETTs.' orl DETROIT, MICHIGAN', lnI s'ssrelvoia. To Pacman MOTOR can cOMPaNY, or DETROIT, MICHI-OIA1T, A CORPORATION OF MICHIGAN.

mrDRocAnBoN Moron.. 1

Application led September 27;-1919. Serial llo. 326,822.

This invention'relates to hydrocarbon mo-- tors, and particularly to means for heating the mixture passing from the carburetorto the motOrL,

5 -One of the objectsof the 'invention is tov provlde an extremely simple heater device l tion type having la circuitous outlet passage for the burnt gases to lthereby more thor` oughly heat the device and 4insure against passage of flame into the motor intake header. g J 1 l Another object of the invention is to vprovide a heater device of the combustiontype in which the igniter is arrangedat a point where the incoming gases turn at substanf tially right angles inpassing through the device. d

' Another Object of the inventionis to provide a heater device with simple and prac ticablemeans for speedingup the incoming gas and breaking up the particles of liquid fuel carried thereby.r v --Other Objects of the invention will appear from the following description taken in connection ,with the drawings, which vvform a part of this specification, and in which: Figure 1y 's a side elevation of a motor intake pipe with a heater device built infaccordance with the present invention con@ nected thereto, the heater device beingpart- :z5 lyfin section;

Fi re 2 is a vertical sectional view on the line 2 of Figure 1; and Figure 3 is a detail section on the line 3-3ofFigure 2. v- Referring to the drawings, 10 represents a motorintake pipe or' manifold having a throttle :valve 10 therein. The intake pipe is shown Vas vertically arranged, :though it will be understood that it may extend in any other desired direction, dependent large- .ly upon the Vlocation of thecarburetor of f the motor relative to the intake passages inthe cylinder block. i t v v The heater device of this invention is indicated in general'by the numeral 11 Vand it 50 comprises a body part 12 forming a chamber .-13 inwhich combustion is adapted to take lace. The lheater portion'of the device is 1n' the vform of-an extension 14, which may be integrally .formed and which is preferably of c. lindrical or tubular shape as shown particu arly in Figures 2l and 3. At the 'unction of this tubular portion and the ody portion 12of-the device, means are prol vided for securing the device to the motor 60 intakepipe above the throttle valve 10. As shown, this means comprises exterior threads v15,.and theintake pipe 10 is provided with a threaded opening 16 through which the portion ,14 extends and by means of which a tight Joint is made and the device is secured to thefint-ake pipe.`

- At right angles, to the extension 14 is an inlet conduit 17 forthe chamber 13.' This conduit is formed by a boss 18 integral with 70 f the body'portion 12 of the device and by a hollow ,'plug'lQ-.whichf is threaded into the boss 18. Adjacent one end of -th-:sy conduit 17, means are provided for breaking up the particles of fuel that are carried by or form part of the mixture, and as shown this means is. in the' form vof a screen 20 which is removably secured'between the hollow plug 19 and vthe boss 18, thus making it an easy matter xto change the sizeof the screen or to remove the screen for cleaning. At theother e'nd of the conduit 17 is a .plate 2.1 having a small opening 22 therein, this opening bein considerably smaller than the interior of t e pipe 23 which sup lies 85 the conduit 17 with mixture .drawn rom vany suitable carbureting Or mixing device. The -pipe 23 is vsecured vtothe pluglQ-b a pipe ttin -24 which also vsecures the p ate 21 remova 'lyin position asshown in Figure 90 .1. vThusthe plate also may be removed and another substitutedtherefor to thereby vary the size of the openingy 22 as' may :be required forv different-sizes of motors.

The conduit 17 is preferably `formed of `substantially'conicals apelass owniin Fi ure --1"with the smallest part adjacent t e .plate 'a1 so thanthe gissuingthirqugh the duit 17 from thc plate to the screen are important features in pr'oducing a good mix# ture for the combustlon chamber and 1n .preventing the propagation of flame backward through the opening 22. Because of the size of this opening 22 thegas is speeded up to a point Where there can be no backiring. i

Within the combustion chamber 13, and preferably substantially at the point Where the gas turns at right angles to enter the extension 14, an igniter 25 is arranged. This igniter is shown in the form of a spark plug ol usual construction, thpugh the points may be separated more than usual because the charge is fired in the combustion space at or less than atmospheric pressure.

For the purpose ot permitting observation of the flame wLthin the combustion chamber y to thus determine the operation of the device, a glass window 26 may be provided opposite thel extension 14, as shown in Figures 1 and 2. The glass is retained by means of a threaded ferrule 27.

In order to retain the burnt gases in the heater device long enough to keep it at a high temperature, and for the purpose f preventing the passage of fiame into the motor intake header, a circuitous passage is provided for the gases from the interior of the extension 14 out to, the motor intake pipe. In the form shown, the two telescoped tubes 28 and 29 are arranged Within the extension 14. The tube 28 is somewhat 'smaller than the interior ot the extension 14 and Ris closed or blind ended at its inner cud, as at 30. Near its outer end it is formed with a series of openings 31 y) permit the passage of gas from the inte ior of the extension 14 of the tube 28. The tube 29 has a through passage 32 which perlnits the v gases to pass from the inner end of the tube 28 to the interior ot' the intake. pipe 10. The outer end of the passage 32 may be branched as shown at 33 so that there are several outlet openings into the intake pipe. The tube 28 is formed at its outer end -w1th an expanded or flanged part 34 ich rests against ashoulder 35 near the outer end ot the exten'sion 14. The outer end of the tube 29'is.enlarged as at 36 and threaded into the end of the extension 14 so that it bears against the flange 34 of the tube 28 and thereby retains both tubes in position.

From the above it will be seen that the heater device may be readily attached to the intake pipe 10 ot' the motor and easily removed therefrom for inspection or repair. It is a self-contained unit and requires only certain amount ot mixture into the combus- 4 i tion chamber 13 through the conduit 17. When a spark is formed by the igniter 25 the mixture in the chamber 13 will be ignited and the hot burned gases will pass through the extension 14 into the intake header 10. The heated extension 14 and the heated gases passing therefrom Will warm up the mixture.

passing through the intake pipe 10 and the said mixture will be more readily fired when it reaches the motor cylinders. The device will operate until the ignition is cut off or the motor is stopped. l

Other forms may bc devised Without departing from the spirit or scope ot the invention.

Having thus described my invention, what I'v claim and desire to secure by Letters Patent is:

1. A heater plug comprising a combustion chamber'and an inlet conduit, a screen in said 'inlet conduit, and a disk in said conduit spaced from the screen and provided with a small inlet opening constituting the sole mixture passage to the chamber.

2. A heater plug comprising a combustion chamber having an inlet conduit, a detachable plate having a small opening forming the inlet to said conduit, and means for removably retaining said plate in position.

3. A heater plug comprising a combustion chamber having an inlet conduit, a screen removably retained.in said conduit, and a plate removably retained in said conduit in spaced'relation to said screen, said plate having an inlet opening. t

4. A heater plug comprising a combustion chamber having an inlet conduit, a screen removably retained in said conduit, and a perforated plate removably retained in said conduit in spaced relation to said screen, said conduit being of somewhat conical form between said plate and screen with the smallest part of the conduit adj acent-the plate. u

5. (A heater plug comprising a combustion chamber having an inlet conduit, a screen removably retained in said conduit, and a perforated plate removably retained in said conduit in spaced relation to said screen, said conduit Widening out from the plate to the screen.

6. A heater plug comprising a main combustion chamber and an extension formed with a circuitous outlet passage, and a transparent window in the wall of said chamber `a second tube entering the first tube and opposite said extension. -secured to the heater portion, said second 7. A heater ping having an elongated tube providing an outlet vfrom the interior of 10 heater portion, a blind ended tube secured the first tube. 5 adjacent the outer end of said portion and In testimony whereof I aix my signature.

extending longitudinally thereinto, said tube y i n v having openings adjacent its outer end, and MILTON TIBBETTS. 

